We would like to let you know that the Global Carbon Budget 2021 has now been published. Please see the Global Carbon Project website (http://www.globalcarbonproject.org) to access the highlights, paper, data, and a number of figures, infographics and videos related to the annual update of the global carbon budget and trends for the year 2020, and projections for 2021. The corresponding paper is currently under review for the journal Earth System Science Data, available from here. You may also want to visit the Global Carbon Atlas http://www.globalcarbonatlas.org to explore in detail global and national CO₂ emissions.